低渗透油藏菱形反九点井网见水时间研究

摘要

In order to solve the problems of reservoir engineering design and dynamic analysis of diamond shaped inverted 9-spot pattern, this paper deduced the breakthrough time formula based on the water flooding theory of low permeability oil reservoir and by using the basic formula of low velocity non-Darcy flow, the flow line integral method and element analysis method. Results of the actual production data calculation of low permeability reservoir XH in Ordos basin showed a relative error of only 11.83%. This method is more widely applied than the existing square inverted 9-spot pattern.%为解决菱形反九点井网的油藏工程设计和油藏动态研究问题，依据低渗透油藏注水开发理论，应用低速非达西渗流基本公式及流线积分法和单元分析法，推导出菱形反九点井网油井见水时间计算公式，且适用于正方形反九点井网。利用鄂尔多斯盆地XH低渗透油藏的实际生产数据进行计算，相对误差只有11.83%。此方法比已有的正方形反九点井网油井见水时间计算公式的应用范围更广泛。